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利用水不溶性β-环糊精聚合物从水溶液中去除孔雀石绿的研究。

Studies on the Removal of Malachite Green from Its Aqueous Solution Using Water-Insoluble β-Cyclodextrin Polymers.

作者信息

Jayanayak Guruprasad M, Ganalu Rajesha, Ukkund Shareefraza J, Ahmed Shamsuddin, AlSubih Majed, Islam Saiful

机构信息

Department of Chemistry, Yuvaraja's College, University of Mysore, Mysuru 570005, India.

Department of Studies in Chemistry, Bharathi College - Post Graduate and Research Centre, Bharathi Nagara 571422, Karnataka, India.

出版信息

ACS Omega. 2024 Feb 23;9(9):10132-10145. doi: 10.1021/acsomega.3c06504. eCollection 2024 Mar 5.

DOI:10.1021/acsomega.3c06504
PMID:38463288
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10918832/
Abstract

The rising global pollution of natural waters by dyes has brought to light the need for adaptable and efficient removal techniques. To create water-insoluble β-cyclodextrin (β-CD) polymers like CA/-CD, TA/-CD, and MA/-CD, several organic acids including citric acid (CA), tartaric acid (TA), and malic acid (MA) were cross-linked with β-cyclodextrin in this study. The obtained polymers were characterized by different advanced analytical techniques such as FTIR, SEM, and UV-vis spectrophotometry. Malachite green dye was removed from aqueous solutions using the synthesized polymers by adsorption. The adsorption investigation was conducted under several conditions, including pH, adsorbent mass, dye concentration, temperature, contact time, adsorption isotherm, and kinetics. The adsorbent CA/β-CD shows the highest adsorption of MG dye in all of the conditions because it contains a high number of carboxyl groups. The negatively charged carboxyl ions of CA/β-CD attract the positively charged MG dye electrostatically and remove MG from aqueous media with an efficiency of 91%. As a result, the findings indicated that water-insoluble polymers based on β-cyclodextrin are well-suited as inexpensive adsorbents to remove colors from aqueous media.

摘要

全球天然水体受染料污染的情况日益严重，这凸显了对适应性强且高效的去除技术的需求。在本研究中，为制备水不溶性的β-环糊精（β-CD）聚合物，如CA/-CD、TA/-CD和MA/-CD，使用了包括柠檬酸（CA）、酒石酸（TA）和苹果酸（MA）在内的几种有机酸与β-环糊精进行交联。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和紫外可见分光光度法等不同的先进分析技术对所得聚合物进行了表征。采用合成的聚合物通过吸附作用从水溶液中去除孔雀石绿染料。在包括pH值、吸附剂质量、染料浓度、温度、接触时间、吸附等温线和动力学等多种条件下进行了吸附研究。吸附剂CA/β-CD在所有条件下对MG染料的吸附量最高，因为它含有大量羧基。CA/β-CD带负电荷的羧基离子通过静电作用吸引带正电荷的MG染料，并以91%的效率从水介质中去除MG。因此，研究结果表明，基于β-环糊精的水不溶性聚合物非常适合作为廉价吸附剂用于从水介质中去除颜色。

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